I recently got back into playing Magic after about 15 years, and Im happy that my current more-mathematically minded brain is finding many ways of analysing the game (so expect more posts on this in the near future)
is a reference to For Mirrodin!, Rouse is a hybriding of Flashback and Embalm, Sabotage was built out of Ninjutsu, Supply was a variant of Monstrous, and Intercept was modelled on Champion
The Power 10 Some dub the Power 9 as a Power 10 since other cards of similar power were printed in the same timeframe, but a few cards fit the bill here
The ability to recast Demilich from the graveyard encourages a resilient gameplan, and the ability to re-cast spells from your graveyard when it attacks
Good news, too: Exiling this Spidey from the graveyard allows you to put it back in the command zone, so you get the full range of abilities here